The McMillan Sand Filtration Site is one of Washington, DC's most conspicuous mysteries. Unbeknownst to the thousands of commuters and residents that pass by its rusted gates daily, below this sprawling parcel of land lies a series of vast underground caverns built in the early 20th century by the Army Corps of Engineers as a natural purification facility for DC's turbid water supply. — Vimeo
Just a few days ago, we published the winning entry of the 2011 DOW Design to Zero competition. Here is now also the third prize winner, the entry Oil Silo Home, by architects Leon Lai and Eric Tan of pinkcloud.dk. The proposal recycles existing oil silos by transforming them into affordable housing for families worldwide. — bustler.net
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